You're Invited...
A few days later (after Heather had returned from Opal with Jess and Harry), mail arrived at the New Guardians headquarters (or their PO box, anyway).  They'd left a couple ways to get a hold of them after the fire rescue, though none that would disrupt their privacy, at least, not yet.

It was an invitation to appear at a charity ball that was being hosted to raise money for the victims of the fire.

This got a team meeting.  "So...." Heather asked.  "Do we go?"